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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 06-02-2015, 12:33 PM   #1
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Join Date: May 2011
Location: Tannersville PA
Posts: 53
My Ride: 03 BMW 325XiT
Tires too stretched?

I put a set of BMW Style 69s on my 03 325xiT and find I am having some issues with the tires. I put 225/40/18 tires on them and have had 1 tire loose all air but after I refiled hasn't lost any since and I have another that always leaks down after a few days. The wheels are 18x8.5 and I am thinking the tires are too small for the rim.

Could that be causing the tire issues? The tires were new with the wheels.

Thanks for any insight.
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Old 06-02-2015, 12:47 PM   #2
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From a fitment standpoint you should be good, 225/40-18 tires fit rims in the 7.5" to 9" size with no issues. Sometimes what's overlooked is a dirty bead on the inside of the used wheel, if this surface has any grime on it the seal will suffer allowing the tire to leak.


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Old 06-02-2015, 03:15 PM   #3
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Thanks..the shop says they will remount the 2 fronts.
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Old 06-03-2015, 07:52 AM   #4
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It is no problem to run 225/40R18 tires on 18X8.5" wheels. This is actually pretty common to do.
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